For ball valves, the car seal must pass around the valve lever and a suitable fixed anchor point. This can be the valve topworks, valve body or nearby steel work. You can even anchor the seal cable on an adjacent valve.

Car Seals for Gate Valves....

For gate valves the valve bonnet is a suitable anchor point. The cable can then pass around the rim or spoke of the valve.

How to create a Car Seal Program.

A car seal program should contain the following elements as a minimum.

A schedule of valves designated 'safety critical'

their safe positions i.e. open or closed.

A clear description of their location so that the reader of the schedule can locate the valve.

A car seal device, as found here on this site. The seal can be a steel cable strand device but plastic ties are also acceptable.

Color coding of seals and tags is recommended to identify the valve safe position, e.g green for open and red for closed. Other seal colors can be designated to indicate the medium flowing through the valve.